| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2014 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <delay.h> |
| #include <soc/addressmap.h> |
| #include <device/i2c.h> |
| #include <soc/clock.h> |
| #include <soc/funitcfg.h> |
| #include <soc/nvidia/tegra/i2c.h> |
| #include <soc/padconfig.h> |
| #include <soc/romstage.h> |
| |
| #include "gpio.h" |
| #include "pmic.h" |
| |
| static const struct pad_config padcfgs[] = { |
| /* AP_SYS_RESET_L */ |
| PAD_CFG_GPIO_OUT1(GPIO_PI5, PINMUX_PULL_UP), |
| /* WP_L */ |
| PAD_CFG_GPIO_INPUT(KB_ROW1, PINMUX_PULL_NONE), |
| /* MODEM_RESET */ |
| PAD_CFG_GPIO_OUT0(KB_ROW11, PINMUX_PULL_DOWN), |
| /* MODEM_PWR_ON */ |
| PAD_CFG_GPIO_OUT0(KB_ROW12, PINMUX_PULL_DOWN), |
| /* MDM_DET - expected to be pulled down by LTE modem */ |
| PAD_CFG_GPIO_INPUT(GPIO_PV1, PINMUX_PULL_UP), |
| /* Power Button - active high / low depending on board id */ |
| PAD_CFG_GPIO_INPUT(KB_COL0, PINMUX_PULL_UP), |
| /* BTN_AP_VOLD_L - active low */ |
| PAD_CFG_GPIO_INPUT(KB_COL6, PINMUX_PULL_UP), |
| /* BTN_AP_VOLU_L - active low */ |
| PAD_CFG_GPIO_INPUT(KB_COL7, PINMUX_PULL_UP), |
| }; |
| |
| static const struct pad_config tpm_pads[] = { |
| PAD_CFG_SFIO(CAM_I2C_SCL, PINMUX_INPUT_ENABLE, I2C3), |
| PAD_CFG_SFIO(CAM_I2C_SDA, PINMUX_INPUT_ENABLE, I2C3), |
| }; |
| |
| static const struct pad_config ec_i2c_pads[] = { |
| PAD_CFG_SFIO(GEN2_I2C_SCL, PINMUX_OPEN_DRAIN|PINMUX_INPUT_ENABLE, I2C2), |
| PAD_CFG_SFIO(GEN2_I2C_SDA, PINMUX_OPEN_DRAIN|PINMUX_INPUT_ENABLE, I2C2), |
| }; |
| |
| static const struct funit_cfg funits[] = { |
| /* TPM on I2C3 @ 400kHz */ |
| FUNIT_CFG(I2C3, PLLP, 400, tpm_pads, ARRAY_SIZE(tpm_pads)), |
| /* EC on I2C2 - pulled to 3.3V @ 100kHz */ |
| FUNIT_CFG(I2C2, PLLP, 100, ec_i2c_pads, ARRAY_SIZE(ec_i2c_pads)), |
| }; |
| |
| static void lte_modem_init(void) |
| { |
| int mdm_det; |
| uint8_t data; |
| |
| /* A LTE modem is present if MDM_DET is pulled down by the modem */ |
| mdm_det = gpio_get(MDM_DET); |
| if (mdm_det == 1) |
| return; |
| |
| printk(BIOS_DEBUG, "Found LTE modem\n"); |
| |
| /* Enable PMIC CLK32KGAUDIO to drive CLK_MDM_32K */ |
| pmic_read_reg(I2CPWR_BUS, TI65913_PAD2, &data); |
| pmic_write_reg(I2CPWR_BUS, TI65913_PAD2, |
| PAD2_GPIO_5_SEC_CLK32KGAUDIO(data), 0); |
| pmic_write_reg(I2CPWR_BUS, TI65913_CLK32KGAUDIO_CTRL, |
| TI65913_MODE_ACTIVE_ON, 0); |
| |
| /* FULL_CARD_POWER_OFF# (A44: MODEM_PWR_ON) and RESET# |
| * (A44: MODEM_RESET) of the LTE modem are actively low and initially |
| * pulled down by the pad config. To properly enable the LTE modem, |
| * de-assert FULL_CARD_POWER_OFF#, wait for at least 10ms, and then |
| * de-assert RESET#. |
| */ |
| gpio_output(MODEM_PWR_ON, 1); |
| udelay(15000); |
| gpio_output(MODEM_RESET, 1); |
| } |
| |
| void romstage_mainboard_init(void) |
| { |
| /* Bring up controller interfaces for ramstage loading. */ |
| soc_configure_funits(funits, ARRAY_SIZE(funits)); |
| soc_configure_pads(padcfgs, ARRAY_SIZE(padcfgs)); |
| |
| /* TPM */ |
| i2c_init(I2C3_BUS); |
| /* EC */ |
| i2c_init(I2C2_BUS); |
| |
| lte_modem_init(); |
| } |
| |
| void mainboard_configure_pmc(void) |
| { |
| } |
| |
| void mainboard_enable_vdd_cpu(void) |
| { |
| /* VDD_CPU is already enabled in bootblock. */ |
| } |